CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
What are combustible substances ?
The substances that undergo combustion are called combustible substances. It may be solid liquid and gas.
What are fuels ?
The substances which provide heat and light are called fuels.
What is the full form of CNG ?
CNG stands for Compressed Natural Gas.
The dark zone of candle flame is
outer zone of complete combustion
zone of partial combustion
inner Zone
none of the above
C.
Match the following option:
A.
Wood
(i)
combustible
B.
Iron nail
(ii)
non-combustible
L.P.G.
(iii)
gaseous fuel
D.
(iv)
flame
E.
Coal
(v)
solid fuel
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